Orthodontic treatment. Pages from an orthodontist's notebook from the 20th Century. The pages contain information on a young female patient before and after she received orthodontic treatment. On the lefthand page there is an annotated image of the girl's profile in 1919 (aged 8 years and 5 months), together with a diagram of the alignment of her teeth, an upper X-ray of her upper jaw (top) and written notes. The opposite page contains the same information recorded in 1920 when she was 10 years 6 months old.